2006-II-21
答案:D
$\begin{array}{cl}
& 2\sin(90^\circ – \
… Read $\begin{array}{cl}
& 2\sin(90^\circ – \
利用畢氏定理,可得
$\begin{array}{rcl}
a^2
B 為把該圖像繞 $O$ 點順時針旋轉 $90^\circ$ 後
$\begin{array}{ll}
\a
留意 $\angle AOB = 135^\circ – 45^\circ = 90^\circ
$\begin{array}{rcl}
x – y & =
$\begin{array}{rcl}
5x – 3y & = &
$\begin{array}{rcl}
\sqrt{(1-0)^2 +
$\begin{array}{cl}
= & \dfrac{(
$\begin{array}{cl}
= & 75 – 60 \
$\begin{array}{rcl}
y & = &
$\begin{array}{rcl}
f(-k) & = &